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The most comon cause of an engine that keeps revving up and down (aka surging) is a dirty air filter.

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Q: What is wrong with your Briggs and Stratton engine that just keeps revving up and down?
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It keeps the engine from over revving.


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You may have clogged jet in the carb, or in the small fuel filter. Check everything from the tank down to carb, and if necessary take carb apart.


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Decompression arrangement on a Briggs and stratton small engine?

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Steam engine device which keeps the speed of the engine constant at all loads is?

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